Hypochondriac and you have dust all over the place? Well I just make sure my power is turned off, (not sure if you need to, but why take the chance) and just use a regular paper towel with windex. Then again, I have plasma so I have a glass screen on my HDTV, so if you have LCD or the other one (LED? Not sure what that one is.) So with LCD you have to be more carefull, but then again, on my LCD monitor, I just use a paper towel as well with windex.
I wouldn't really go out to get all the extra microfiber cloth. What worked in the old days, just work as good today. Don't have to be fancy smancy.
Also if you don't dust your PS3 or TV, it adds an extra layer of something like a blanket. So things get hotter. Also if they block the VENTS espically on the HDTV you are blocking the release of the HEAT and it will shorten you life of the TV. I didn't check in a month (so easy to forget the back of the TV) and I was SHOCKED how much dust was collected. For that, I used those feather duster (long handle, multi coloured feathers) to clean that off. I use that for my 360 and PS 3 as well, really great of collecting dust.
Make sure you go outside and shake it. Since you are a hypocondriac, make sure you hide behind the door so you don't get the dust back on you if the wind is blowing.

. I got the dust blown back on me and I felt horrible and had to run into the shower to get it off me.

Hope this helps you.